Science : Ch 11 – The Human Eye and the Colourful World

At noon, the Sun looks white as:

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light:

Which of the following phenomena contributes signifcantly to the reddish appearance of the sun at sunrise or sunset?

In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray

The red colour of the sun at the time of sunrise and sunset is because:

Power of a lens is the measure of the degree of

Arpit remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed ,What is the total time diference on duration of day on earth?

When a fine beam of sunlight enters a smoke filled room, smoke particles become visible due to scattering of light by these particles

The splitting of light into its component colours is called

Lenses which have both concave and convex structure.

When a person can see faraway objects but not nearby objects.

Myopia can be corrected by using

The colour of scattered light depends on the

The sky appears black to an astronaut as there is no

Visible spectrum is the band of coloured components of a